//
//  XHTabBar.swift
//  swift新浪微博
//
//  Created by 魏兴浩 on 15/11/25.
//  Copyright © 2015年 wxh. All rights reserved.
//

import UIKit

class XHTabBar: UITabBar {

    override func layoutSubviews() {
        super.layoutSubviews()
        print("layoutSubviews")
        
        //计算itme的宽度
        let width = bounds.size.width/5
        //设置frame
        let frame = CGRect(x: 0, y: 0, width: width, height: bounds.size.height)
        
        //记录是第几个view
        var index = 0
        //重新设置按钮位置
        for view in self.subviews{
            if view is UIControl && !(view is UIButton){
                //设置frame 
                view.frame = CGRectOffset(frame, CGFloat(index) * width, 0)
                index += index == 1 ? 2 : 1
            }
        }
        //设置撰写按钮的frame
        composeButton.frame = CGRectOffset(frame, 2 * width, 0)
    }
    
    //设置撰写按钮
    lazy var composeButton: UIButton = {
        let button = UIButton()
        //设置按钮背景图片
        button.setBackgroundImage(UIImage(named: "tabbar_compose_button"), forState: UIControlState.Normal)
         button.setBackgroundImage(UIImage(named: "tabbar_compose_button_highlighted"), forState: UIControlState.Highlighted)
        
        //设置按钮图片
        button.setImage(UIImage(named: "tabbar_compose_icon_add"), forState: UIControlState.Normal)
        button.setImage(UIImage(named: "tabbar_compose_icon_add_highlighted"), forState: UIControlState.Highlighted)
        
        //添加到tabBar里面
        self.addSubview(button)
        
        return button

    }()
}
